Samuel geossioed



UNITED STATES PATENT OFFIcE.

SAMUEL ceossiom), or LES MoussIEREs, FRANCE.

METHOD OF PRODUCING ARTIFICIAL PRECIOUS STONES.

SPECIFICATION forming part of Letters Patent No. 297,598, dated April 29, 1884.

Application filed December 1'7, 1883. (No specimens.) Patented in France October 25, 1883, N 0. 151,732.

, have invented certain Improvements in the Method of Producing Artificial Precious Stones, (for which I have obtained Le ters Patent in France, under date of October 25, 1883, No. 151, 7 32;) and I do hereby declare the following to be a full, clear, and exact description of the same.

My present invention relates to improvements in the art of producing artificial precious stones as described in Letters Patent of the United States granted to me under date of July 3, 1883, No. 280,467, and under date of De cember 11, 1883, No. 290,040.

The object of this invention 1s to produce, with facility and at little expense, multi-colored artificial precious stones, or artificial stones of a given color, by the association of enamels of different colors with or without strass. These artificial precious stones I have denominated colored ormulti-colored diamondines.

The present invention may be carried into practical effect in various ways, which necessarily depend on the nature of the gem to be produced, its color, and brilliancy.

In general, for producinga gem of uniform color, or of a variegated color, of medium brilliancy, I take a suitable receiver or crucible having a series of cells or holes, either cylindrical, square, octagonal, or of other forin in cross-section, and of a capacity equal to, or

nearly equal to, the size of stone to be obtained,

said cells having a flat bottom. In these cells I place, in superposed layers, first a piece of strass and on top of this alternate layers of enamel of different colors, to produce either a gem of a given color, or one of different colors, or variegated. These are then subjected to heat, and either fritted, fused, or melted together. According to the brilliancy and the depth of color the stone is to have, the above of strass may be interposed between any, two or more pieces of enamel and the whole fritted, fused, or melted together; nor is it necessary that the enamel em loyed should be previously polished. each stone separately, a block or large stone may be produced from which the stones may be cut and then prepared for setting. The strass may also'be dispensed with and a multicolored stone obtained, or a stone of a given color, by the combined colors of the enamel.

Having described my invention, what I claim is--' 1. The hereindescribed method of obtaining artificial precious stones,which consists 60 method will be varied-as, for instance, a piece 4 5 If desired, instead of producing 50 or of a variegated color, which consists in 6 fritting, fusing, or melting together superposed layers of colored enamels to a foundationlayer of strass, as described.

3. The herein-described method of obtain-1 SAM. GROSSIORD.

Witnesses:

, OAMILLE GHARROPPIN,

EMILE KANTER. 

